https://www.vice.com/en_us/article/zmjb3a/humans-have-done-50-million-years-of-damage-to-new-zealands-birds

In less than a century, humans have wiped out so many of New Zealand’s land birds that it would take 50 million years to recover the number of species we have destroyed there.

To put that number in perspective: humans in their modern form have been around for about 300,000 years. Our ancestors have only been on earth for about 6 million years.